By Adrienne Emmanuel. Electrical Wiring. Publised at Saturday, January 06th 2018, 01:57:12 AM. SMT fixtures are rigid PCB carriers that allow manufacturers to load single or multiple irregular boards, and then take them through the standard processing machines. This makes it possible to carry out tasks such as automatic mounting of electronic components, infra-red reflow soldering, wave soldering, automatic testing, etc.
By Mailys Laurent. Motor Wiring. Published at Wednesday, January 03rd 2018, 23:58:29 PM. Brushed DC motors rotate continuously when DC voltage is applied to their terminals. The stepper motor is known by its property to convert a train of input pulses (typically square wave pulses) into a precisely defined increment in the shaft position. Each pulse moves the shaft through a fixed angle. Stepper motors effectively have multiple "toothed" electromagnets arranged around a central gear-shaped piece of iron. The electromagnets are energized by an external driver circuit or a micro controller. To make the motor shaft turn, first, one electromagnet is given power, which magnetically attracts the gear teeth. When the gear teeth are aligned to the first electromagnet, they are slightly offset from the next electromagnet.
By Fleurette Nina. Car Wiring. Published at Wednesday, January 03rd 2018, 15:37:45 PM. The starter solenoid has very large contacts to carry the batterys full current. Its wire coil is actuated by a smaller current from the ignition switch, at which time the iron core slams down to make contact and turn on the starter motor. Most non-Ford starter motors employ a solenoid built into the motor itself. This type of solenoid not only provides the motors electrical power but also mechanically engages the starters drive gear onto the flywheel.
By Dorian Yannic. Electrical Wiring. Published at Wednesday, January 03rd 2018, 15:08:21 PM. Panelization is the arranging of arrays of multiple PCBs onto a single substrate that fits in the standard processing machine. A panel may hold multiple boards with similar or different sizes and shapes. This method is faster and less costly compared to the fixtures, which require a custom carrier for every new PCB design.
By Olivier Constance. Motor Wiring. Published at Wednesday, January 03rd 2018, 00:16:48 AM. The arduino sends pulses to the servo motor much like sending them to an ESC. The pulses have a different meaning. The pulses describe a spot to go to. Within the servo there is a feedback mechanism that counts shadows or turns a variable resistor. The servo circuit board then moves the servo to that spot. It knows when it has reached the spot when a certain number of shadows have past or when the resistance reaches a certain value. The arduino has to keep sending the same position over and over again to hold the motor in a current spot. Short pulses go one direction, long pulses the opposite direction, medium pulse widths go to the middle. Middle is typically 1.5 milli seconds.
By Dorian Yannic. Motor Wiring. Published at Tuesday, January 02nd 2018, 20:09:39 PM. A unipolar stepper motor has one winding with center tap per phase. Each section of windings is switched on for each direction of magnetic field. Since in this arrangement a magnetic pole can be reversed without switching the direction of current, the commutation circuit can be made very simple (e.g., a single transistor) for each winding. Typically, given a phase, the center tap of each winding is made common: giving three leads per phase and six leads for a typical two phase motor. Often, these two phase commons are internally joined, so the motor has only five leads.
By Cyrille Lothaire. Car Wiring. Published at Tuesday, January 02nd 2018, 20:07:55 PM. With all those things to worry about, many enthusiasts overlook the electrical wiring system. A lousy wiring job will keep your electrical accessories from operating at full potential—and that means subpar performance. Many people are intimidated by the prospect of wiring a vehicle. But a proper wiring job doesn’t have to be a scary task—we’ve put together a few tips to help make the job a little bit smoother.
By Claudine Nicolette. Car Wiring. Published at Tuesday, January 02nd 2018, 15:21:04 PM. Even if only one wire has overheated, inspect all the others to make sure their insulation is not damaged. Before cutting out damaged wires, make sure that the colour coding is the same at each end of the damaged section of each wire, and that it is not so discoloured that it is unrecognisable. If there is any chance of confusion, label both ends.
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